/*
 * Copyright 2007 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*namespace com.google.zxing.common {*/

import GridSampler from './GridSampler'
import BitMatrix from './BitMatrix'
import PerspectiveTransform from './PerspectiveTransform'
import Exception from './../Exception'

/**
 * @author Sean Owen
 */
export default class DefaultGridSampler extends GridSampler {

  /*@Override*/
  public sampleGrid(image: BitMatrix,
                              dimensionX: number /*int*/,
                              dimensionY: number /*int*/,
                              p1ToX: number/*float*/, p1ToY: number/*float*/,
                              p2ToX: number/*float*/, p2ToY: number/*float*/,
                              p3ToX: number/*float*/, p3ToY: number/*float*/,
                              p4ToX: number/*float*/, p4ToY: number/*float*/,
                              p1FromX: number/*float*/, p1FromY: number/*float*/,
                              p2FromX: number/*float*/, p2FromY: number/*float*/,
                              p3FromX: number/*float*/, p3FromY: number/*float*/,
                              p4FromX: number/*float*/, p4FromY: number/*float*/): BitMatrix /*throws NotFoundException*/ {

    const transform = PerspectiveTransform.quadrilateralToQuadrilateral(
        p1ToX, p1ToY, p2ToX, p2ToY, p3ToX, p3ToY, p4ToX, p4ToY,
        p1FromX, p1FromY, p2FromX, p2FromY, p3FromX, p3FromY, p4FromX, p4FromY)

    return this.sampleGridWithTransform(image, dimensionX, dimensionY, transform)
  }

  /*@Override*/
  public sampleGridWithTransform(image: BitMatrix,
                              dimensionX: number /*int*/,
                              dimensionY: number /*int*/,
                              transform: PerspectiveTransform): BitMatrix /*throws NotFoundException*/ {
    if (dimensionX <= 0 || dimensionY <= 0) {
      throw new Exception(Exception.NotFoundException)
    }
    const bits = new BitMatrix(dimensionX, dimensionY)
    const points = new Float32Array(2 * dimensionX)
    for (let y = 0; y < dimensionY; y++) {
      const max = points.length
      const iValue: number/*float*/ = y + 0.5
      for (let x = 0; x < max; x += 2) {
        points[x] = /*(float)*/ (x / 2) + 0.5
        points[x + 1] = iValue
      }
      transform.transformPoints(points)
      // Quick check to see if points transformed to something inside the image
      // sufficient to check the endpoints
      GridSampler.checkAndNudgePoints(image, points)
      try {
        for (let x = 0; x < max; x += 2) {
          if (image.get(Math.floor(points[x]), Math.floor(points[x + 1]))) {
            // Black(-ish) pixel
            bits.set(x / 2, y)
          }
        }
      } catch (aioobe/*: ArrayIndexOutOfBoundsException*/) {
        // This feels wrong, but, sometimes if the finder patterns are misidentified, the resulting
        // transform gets "twisted" such that it maps a straight line of points to a set of points
        // whose endpoints are in bounds, but others are not. There is probably some mathematical
        // way to detect this about the transformation that I don't know yet.
        // This results in an ugly runtime exception despite our clever checks above -- can't have
        // that. We could check each point's coordinates but that feels duplicative. We settle for
        // catching and wrapping ArrayIndexOutOfBoundsException.
        throw new Exception(Exception.NotFoundException)
      }
    }
    return bits
  }

}
